This makes me sad. Here's a list of U.S.-produced television series whose essential nature is "Captain + spaceship + crew". Years represent the U.S. television series year, which begins in September and ends in June of the following year.
|Star Trek: The Next Generation||1987 - 1994|
|Star Trek: Deep Space Nine||1993 - 1999|
|seaQuest DSV||1993 - 1996|
|Babylon 5||1994 - 1999|
|Earth 2||1994 - 1995|
|Star Trek: Voyager||1995 - 2001|
|Space Above and Beyond||1995 - 1996|
|Sliders||1995 - 2000|
|Stargate: SG-1||1997 - 2007|
|Farscape||1999 - 2003|
|Andromeda||2000 - 2005|
|Star Trek: Enterprise||2001 - 2005|
|Battlestar: Galactica||2004 - 2009|
|Stargate: Atlantis||2004 - 2009|
|Stargate: Universe||2009 - 2011|
Is there one coming up for 2012 that I've missed? Because if there isn't, 2012 will be the first year without such a series since 1987. Yes, I'm aware of Red Dwarf. But it's not U.S.-produced.
EDIT (12/Jul/2012): Ciar Maera and ChinookHK both reminded me of Falling Skies on TNT, which technically fits into the same framework (well, at least as well as Sliders does anyway). Thanks for the reminder! I'll have to check it out.